/*
 * Copyright (c) 2001, 2004, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 *
 *
 */

package com.sun.imageio.plugins.gif;

import java.util.Arrays;
import javax.imageio.ImageTypeSpecifier;
import javax.imageio.metadata.IIOMetadataFormat;
import javax.imageio.metadata.IIOMetadataFormatImpl;

public class GIFImageMetadataFormat extends IIOMetadataFormatImpl {

  private static IIOMetadataFormat instance = null;

  private GIFImageMetadataFormat() {
    super(GIFImageMetadata.nativeMetadataFormatName,
        CHILD_POLICY_SOME);

    // root -> ImageDescriptor
    addElement("ImageDescriptor",
        GIFImageMetadata.nativeMetadataFormatName,
        CHILD_POLICY_EMPTY);
    addAttribute("ImageDescriptor", "imageLeftPosition",
        DATATYPE_INTEGER, true, null,
        "0", "65535", true, true);
    addAttribute("ImageDescriptor", "imageTopPosition",
        DATATYPE_INTEGER, true, null,
        "0", "65535", true, true);
    addAttribute("ImageDescriptor", "imageWidth",
        DATATYPE_INTEGER, true, null,
        "1", "65535", true, true);
    addAttribute("ImageDescriptor", "imageHeight",
        DATATYPE_INTEGER, true, null,
        "1", "65535", true, true);
    addBooleanAttribute("ImageDescriptor", "interlaceFlag",
        false, false);

    // root -> LocalColorTable
    addElement("LocalColorTable",
        GIFImageMetadata.nativeMetadataFormatName,
        2, 256);
    addAttribute("LocalColorTable", "sizeOfLocalColorTable",
        DATATYPE_INTEGER, true, null,
        Arrays.asList(GIFStreamMetadata.colorTableSizes));
    addBooleanAttribute("LocalColorTable", "sortFlag",
        false, false);

    // root -> LocalColorTable -> ColorTableEntry
    addElement("ColorTableEntry", "LocalColorTable",
        CHILD_POLICY_EMPTY);
    addAttribute("ColorTableEntry", "index",
        DATATYPE_INTEGER, true, null,
        "0", "255", true, true);
    addAttribute("ColorTableEntry", "red",
        DATATYPE_INTEGER, true, null,
        "0", "255", true, true);
    addAttribute("ColorTableEntry", "green",
        DATATYPE_INTEGER, true, null,
        "0", "255", true, true);
    addAttribute("ColorTableEntry", "blue",
        DATATYPE_INTEGER, true, null,
        "0", "255", true, true);

    // root -> GraphicControlExtension
    addElement("GraphicControlExtension",
        GIFImageMetadata.nativeMetadataFormatName,
        CHILD_POLICY_EMPTY);
    addAttribute("GraphicControlExtension", "disposalMethod",
        DATATYPE_STRING, true, null,
        Arrays.asList(GIFImageMetadata.disposalMethodNames));
    addBooleanAttribute("GraphicControlExtension", "userInputFlag",
        false, false);
    addBooleanAttribute("GraphicControlExtension", "transparentColorFlag",
        false, false);
    addAttribute("GraphicControlExtension", "delayTime",
        DATATYPE_INTEGER, true, null,
        "0", "65535", true, true);
    addAttribute("GraphicControlExtension", "transparentColorIndex",
        DATATYPE_INTEGER, true, null,
        "0", "255", true, true);

    // root -> PlainTextExtension
    addElement("PlainTextExtension",
        GIFImageMetadata.nativeMetadataFormatName,
        CHILD_POLICY_EMPTY);
    addAttribute("PlainTextExtension", "textGridLeft",
        DATATYPE_INTEGER, true, null,
        "0", "65535", true, true);
    addAttribute("PlainTextExtension", "textGridTop",
        DATATYPE_INTEGER, true, null,
        "0", "65535", true, true);
    addAttribute("PlainTextExtension", "textGridWidth",
        DATATYPE_INTEGER, true, null,
        "1", "65535", true, true);
    addAttribute("PlainTextExtension", "textGridHeight",
        DATATYPE_INTEGER, true, null,
        "1", "65535", true, true);
    addAttribute("PlainTextExtension", "characterCellWidth",
        DATATYPE_INTEGER, true, null,
        "1", "65535", true, true);
    addAttribute("PlainTextExtension", "characterCellHeight",
        DATATYPE_INTEGER, true, null,
        "1", "65535", true, true);
    addAttribute("PlainTextExtension", "textForegroundColor",
        DATATYPE_INTEGER, true, null,
        "0", "255", true, true);
    addAttribute("PlainTextExtension", "textBackgroundColor",
        DATATYPE_INTEGER, true, null,
        "0", "255", true, true);

    // root -> ApplicationExtensions
    addElement("ApplicationExtensions",
        GIFImageMetadata.nativeMetadataFormatName,
        1, Integer.MAX_VALUE);

    // root -> ApplicationExtensions -> ApplicationExtension
    addElement("ApplicationExtension", "ApplicationExtensions",
        CHILD_POLICY_EMPTY);
    addAttribute("ApplicationExtension", "applicationID",
        DATATYPE_STRING, true, null);
    addAttribute("ApplicationExtension", "authenticationCode",
        DATATYPE_STRING, true, null);
    addObjectValue("ApplicationExtension", byte.class,
        0, Integer.MAX_VALUE);

    // root -> CommentExtensions
    addElement("CommentExtensions",
        GIFImageMetadata.nativeMetadataFormatName,
        1, Integer.MAX_VALUE);

    // root -> CommentExtensions -> CommentExtension
    addElement("CommentExtension", "CommentExtensions",
        CHILD_POLICY_EMPTY);
    addAttribute("CommentExtension", "value",
        DATATYPE_STRING, true, null);
  }

  public boolean canNodeAppear(String elementName,
      ImageTypeSpecifier imageType) {
    return true;
  }

  public static synchronized IIOMetadataFormat getInstance() {
    if (instance == null) {
      instance = new GIFImageMetadataFormat();
    }
    return instance;
  }
}
